AS IS:
We can do Cut and Paste of an Attribute from one Entity to an other:
EFFECT: All Options (Events, Associations, Rules etc) are Preserved however references inside the Expressions / Tables / Artifacts have to be updated manually.
TO BE:
A Deep Refactoring Tool which can move an Attribute from Entity to Entity and recognize if the Automatic Update of Expressions, Refs is possible and if yes, do them automatically. (aka if there is a Path from the Original Entity to the New Entity)